Document Type Replaced Internet-Draft (individual)
Authors Michael Welzl  , Safiqul Islam  , Kristian Hiorth  , Jianjie You 
Last updated 2016-09-22 (latest revision 2016-03-21)
Replaced by draft-welzl-tcp-ccc
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Intended RFC status (None)
Expired & archived
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document specifies a method to encapsulate multiple TCP connections using only one UDP port number pair. Doing so allows for a relatively easy implementation of coupled congestion control for the TCP connections. This can have several performance benefits, and it makes it possible to precisely assign a share of the congestion window to the connections based on priorities. It also enables use of UDP-based NAT traversal techniques, and it can act as a framework for experimentation with novel changes to the TCP standard.


Michael Welzl (
Safiqul Islam (
Kristian Hiorth (
Jianjie You (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)